Overlaying repair method for worn roller

A repair method and roll technology are applied in the field of surfacing repair of worn parts and surfacing repair of worn rolls, which can solve the problems of decreased wear resistance of rolls, shortened service life of surfacing repaired rolls, poor hardness uniformity of surfacing repaired layers, etc.

Inactive Publication Date: 2013-12-04
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when the above technology is used for the surfacing repair of worn rolls, the following problems generally exist: the hardness uniformity of the surfacing repair layer is poor, and the use of the roll is extremely unstable; Decrease in abrasiveness; the strength and toughness of the surfacing repair layer are low, which leads to fatigue cracking and peeling of the roll during use, and reduces the service life of the surfacing repair roll

Method used

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  • Overlaying repair method for worn roller
  • Overlaying repair method for worn roller

Examples

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Effect test

Embodiment 1

[0025] A surfacing welding repair method for a worn roll with a roll diameter of φ350mm, comprising the following process steps: first turning the worn surface of the worn roll, then surfacing a high-strength and tough transition layer on the processed surface, and then surfacing a wear-resistant transition layer on the transition layer The working layer is then heat-treated to the surfacing roll, and finally finished to the specified size and precision. Its specific process steps are:

[0026] ① Turn the worn surface of the worn roll to remove all cracks and holes to obtain a smooth worn surface of the roll.

[0027] ② Then surfacing a high-strength transition layer on the processed surface of the above-mentioned worn roll, and its thickness is controlled at 3.5mm, and then surfacing a wear-resistant working layer on the transition layer, its thickness is controlled at 35mm. During the surfacing process of the roll, the roll The body temperature is controlled at 380°C.

[0...

Embodiment 2

[0030] A surfacing welding repair method for a worn roll with a roll diameter of φ380mm, comprising the following process steps: first turning the worn surface of the worn roll, then surfacing a high-strength and tough transition layer on the processed surface, and then surfacing a wear-resistant transition layer on the transition layer The working layer is then heat-treated to the surfacing roll, and finally finished to the specified size and precision. Its specific process steps are:

[0031] ① Turn the worn surface of the worn roll to remove all cracks and holes to obtain a smooth worn surface of the roll.

[0032] ② Then surfacing a high-strength and tough transition layer on the processed surface of the above-mentioned worn roll, the thickness of which is controlled at 5mm, and then a wear-resistant working layer is surfacing on the transition layer, and its thickness is controlled at 45mm. During the surfacing process of the roll, the roll body The temperature is contro...

Embodiment 3

[0035] A surfacing welding repair method for a worn roll with a roll diameter of φ300mm, comprising the following process steps: first turning the worn surface of the worn roll, then surfacing a high-strength and tough transition layer on the processed surface, and then surfacing a wear-resistant transition layer on the transition layer The working layer is then heat-treated to the surfacing roll, and finally finished to the specified size and precision. Its specific process steps are:

[0036] ① Turn the worn surface of the worn roll to remove all cracks and holes to obtain a smooth worn surface of the roll.

[0037] ② Then surfacing a high-strength and tough transition layer on the processed surface of the above-mentioned worn roll, the thickness of which is controlled at 3mm, and then a wear-resistant working layer is surfacing on the transition layer, and its thickness is controlled at 20mm. During the surfacing process of the roll, the roll body The temperature is contro...

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Abstract

The invention discloses an overlaying repair method for a worn roller. The method is characterized by comprising the following process steps of turning the worn surface of the worn roller; overlaying a high-toughness transition layer on the turned surface; overlaying a wear-resistant working layer on the transition layer; performing heat treatment on the roller subjected to overlaying repair; and performing finish machining on the roller to enable the roller to reach the specified dimension and precision. Compared with the past production and manufacture process and production method, the production and manufacture cost is relatively low, the production and manufacture period is relatively short, and the roller subjected to overlaying repair is long in service life.

Description

technical field [0001] The invention discloses a surfacing repair method for wearing parts, in particular to a surfacing repair method for worn rolls, and belongs to the technical field of surface treatment. Background technique [0002] Rolls are key tools in steel rolling production and must be able to withstand quite strong forces and heat. In addition to good fracture resistance, the surface should also have good wear resistance and heat resistance. This is not only because the roll is closely related to the cost of the product, but also directly determines the quality of the hot-rolled product and the production rate of the rolling mill. Therefore, the research on improving the surface wear resistance of hot rolls has attracted attention at home and abroad, and the materials of hot rolls have been continuously improved and developed. Steel, high-speed steel and cemented carbide, which are widely used abroad so far, are roughly the development process of hot rolling rol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/02B23K35/30B23P6/00
Inventor 苏振清李祖来刘洪喜蒋业华符寒光
Owner BEIJING UNIV OF TECH
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